Charging-doors for furnaces.



H. N. LEASK. CHARGING DOORS FOR FURNACES.

APPLIGATION FILED DBO.30, 1910.

gm M e SHEETS4SHEET 1 .INVENTOR Patented MarQSO, 1915.

nnnnn 1 H N. LEASK. CHARGING DOORS FOB, FURNACES.

APPLICATION FILED DEC. 30, 1910.

m R m M. w ,m ,1. T 0 w 6 4 n m V a m N M m U U lz. I H 7 m m W J P A. H//

s E a E N H W H. N. LEASK. CHARGING DOORS FOR FURNACES.

APPLICATION FILED DEC. 30, 1910.

Patented Mar. 30, 1915.

e SHEETS-SHEET 3 H. N. LEASK. CHARGING DOORS FOR FURNACES. APPLICATION FILED DEC. 30, 1910.

6 SHEETS-SHEET 4.

Patented Mar. 30, 1915.

d U D L a M: 9, N m M U m l W 1 W 1 v lm H. N. LEASK.

CHARGING DOORS FOR FURNACES. APPLIOATIOH FILED DBO. so, 1910.

1,1 33,978, Patented Mar. 30, 1915.

6 SHEETS-SHEET 5.

LM L

Fig. 8.

WITNESSES INVENTOB 727z; g7Z Z72sa s-&

H. N. LEASK. CHARGING DOORS FOR FURNACES. APPLICATION FILED DBO. so,- 1910.

Patented Mar. 30, 1915.

a M E wH S n m m 0* Q a S e rAAN A 206 zJJJ I i UNITED STATES PATENT OFFICE.

HENRY NORMAN LEASK, or EcRimoNr, ENGLAND.

CHARGING-DOORS FOR FURNACES.

Specification of Letters Fatent.

Patented Mar. 30, 1915.

Application filed December 80, 1910. Serial No. 600,012.-

To all whom it may concern:

Be it known that I, HENRY NORMA Lmsnfa British subject, residing at Egremont, county of Chester, England, have invented certain new and useful Improvements in Charging-Doors for Furnaces, of

like which may or may not support an up-.

per door adapted to close the bottom of a fuel container or receptacle or means for opening and for closing doors attached to the bottom of such containers and a lower door adapted to close the actual furnace,

opening with or without a tundish or funnel adapted to surround the space between the container or receptacle and the furnace opening when the fuel is being fed to the fire, the furnace or lower door being connected to the upper door or carriage or its operating means by one or more links or the like and being also arran edto run on wheels upon runways or gui es which immediately above the furnace opening are preferably inclined so that when the door comes over the furnace opening it is dropped down into position on or over the opening, a water, sand or-other seal being provided if desired to receive a depending flange from the door adapted to enter same, said flange being preferably inclined forward so as to enter the trough in a direction parallel to the inclines in order to avoid splashing and to take up less room.

The invention will be fully described with reference to the accompanying drawings.

Figure 1 is a sectional side view showing one form of the invention with the doors closed. Fig. 2 'is a similar view showing the doors open. Fig. 3 is a sectional view showing a. modified arrangement. Fig. 4 is a sectional view showing another modification. Fig. 5 is a transverse section of the structure shown by Fig. 4:. Fig. 6 is a sectional view of a further modified arrangement of the invention in which the upper carriage carries means for closing doors hinged or attached to the bottom of the contalner. Fig. '1 is a similar view showing a modified arrangement-of structure of Fig. 6. Fig. 8 1s a view showing another modified arrangement of structure of Fig. 6. Fig. 9 1s a similar view showing a still further modification. i

As shown in Figs. 1 and 2 a'fixed hopper B 1s arranged over the furnace door or feed opemng A and an upper carriage C runnlng on rails c carries a plate D which is adapted normally to form a door or the like to close the bottom of the hopper B. This carriage C and plate D are arranged so that they can be reciprocated in any suitable manner as for instance by means of a hydraulic ram (13. The main furnace door F for closing the feed opening is mounted upon a second carriage E which is attached to the upper carriage C or the ram 03 by means of a suitable link e. The carriage E runs on suitable rails or runways e which immediately over the furnace opening are inclined upward so that when a pull is'exerted upon the carriage E and door F they rise upward and a depending flange f with which it is preferably provided is lifted out of the water, sand or the like seal 1; arranged aroundthe furnace opening A. This flange f is preferably inclined as above in such a manner that when the door is lowered into position the flange enters the water or sand in the seal a in a line parallel to the inclines so as to prevent or obviate any splashing.

The upper carriage C is preferably providedwith a tundish or the like G which is adapted to surround the furnace opening A and to fill up the space between the bottom of'the hopper B and the furnace opening so as to direct any material fed from the hopper into the fire and to prevent it entering into the seal or trough or. around the opening. Where such a tundish or tunnel G is employed for directing the fuel from a container into the furnace the side 9 farthest from the door may be arranged separately from the tundish being for instance pivoted to the-"hopper B as shown and adapted to drop into position previously to the opening of the bottom of the hopper so as to prevent any fuel falling into the water or sand seal or trough (1 around the mouth of the furnace. A projection or the like 9 upon the side-g is preferably engaged by a slide 9 mounted on the carriageand adapted to relO-i / the trough a'and prevent the-lug in Fig. 3. In this arrangement the door F and its carriage E are not directly connected to the carriage C but the carriage E is provided with a lug or projection H adgpted to engage a corresponding projection on the carriage C tomove it forward when the carriage E in its movement has uncovered the furnace opening A. The carriage is also provided with a second lug or pro]ection It ada ted to engage the trolley C and push it bac when the doors are to be closed. The carriage E may be operatedby a ram as above described or by a chain J as shown or in any other suitable and convenient manner. In order to permit the fiangeif to pass from becoming disengaged from the projection K when the roller 8 passes into the recess of the. track 6, the f urnace door F is arranged to run upon two sets of rails so that as the furnace door is moved farther to the right than in the position shown in Fig. 2, the roller g will not descend into the recess of the track, but keeps its level on another rail. Another modified arrangement is shown in Figs. 4: and 5. In this arrangement instead of sealing the furnace door F with a water orsand seal the furnace opening A is provided with a rim K the top edge of which is finished or arranged in an inclined plane. The bottom edge of the door F is constructed of a corresponding inclination so that when the door is moved horizontally into the closing position it makes a tight joint with the rim. As shown the carriage Eruns on separate rails e to the carriage C, but in this arrangement, if desired, both carriages may run on the same rails. The bearings by which the door F is suspended are preferably slotted as shown so that the door F may be moved forward till its whole Wei ht rests on the rim K.

I .desired the rails e in any of the above arrangements may be inclined slightly upward beneath the container B to cause the door D to make a tight joint therewith.

As shown in Fig. 6 the fuel. hopper or container B is constructed at the bottom with hinged doors L'provided with runners or rollers Z which are normally held closed by a rail or rails M or a plate carried by the trolley C so arranged that when the carriage is withdrawn withthe furnace door F the doors L are allowed to dro and discharge the contents of the hopper into the furnace. Or as shown in Fig. 7, the runners or rollers Z may be carried'by the carria e and engage rails, battens or the like}?! on the doors L ofthecontainer.

As shown in Fig. 8 instead of using a fixed hopper or container B a removable hopper or skip B'- mabe employed having a bottom door L of t e type last described adapted to be placed in position over the furnace opening and 'so arranged that the doors L may be released or opened in the manner just-described. The doors L of the skip as shown may be held closed by its own weight by .means of the supporting chain or sling N by which it is hung or carried by a crane or the like and may be adapted to be freed so-that they can open when the skip is lowered into position, and the weight is taken off the chain or sling.

In Fig. 9 the invention is shown applied to a movable' container consisting of a number of separate compartments or receptacles B arranged. in one truck or the like 0 adapted to be moved backward and forward over the furnace opening A to bring each separate compartment B thereover. The bottom of each separate compartment B is constructed with one or more doors L as above described adapted to be released or opened to vdischarge the contents into the fire. This may be accomplished in the manner above described, rails, battens or the like being employed to retain the doors of the compartments closed when they are not over the furnace opening, or as shown the doors L of the separate compartments may be normallyheld closed by the rail or run way P over which the truck 0 travels, being released at a gap or break R in the rail which is arranged over the furnace open-' ing. This gap is normally maintained closed by a short length of rail pheld in position by the carriage C. In some cases ,the carriage C may be dispensed with the guide to retain the rail 12 in position being carried directly by-the carriage E. I

What I claim. as my invention and desire toprotect by Letters Patent is 1. In a furnace closing and charging means for refuse destructors and other fur naces, the combination of a furnace having a seal around its inlet opening, carriages cooperating with the inlet opening of the furnace, one carriage embodying a door for the furnace and said door having rising and depressing movements relatively to they furnace inlet and provided with flanges toengage the seal, .and the other carriage having a charging means .forthe furnace, one-car- 13116.;1'8413, .one, above. the other, and associated for movement one by the other, one carmeans for operating the carriages.

3. In a furnace closing and charging means for refuse destructors and other furnaces, the combination of a furnace having an upper inlet opening, carriages arranged one above the other, the lower carriage embodying a rising and depressing closure for the furnace and the upper carriage having a charging means for the furnace, and means or operating the carriages.

4. In a furnace closing and charging means for refuse destructors and other furnaces, rails adjacent to the inlet of the furnace, structurally independent superposed carriages longitudinally shiftable on the rails, one carriage embodying a door for the furnace and the other having a charging means for the furnace, one carriage being connected to and operated with the other, and means for operating the carriages.

5. In a furnace closing and charging means for refuse destructors and other furnaces, the combination of a furnace having an upper inlet opening and a container for olding material for charging the furnace through said opening, rails at different elea carriage embodying a rising and depressing closure for the furnace and engaging the lower rails, the lower rails having depressions therein, a second carriage having a closure for the container, the carvations,

riages being associated for movement of one by the other, and mechanism for operating both carriages.

-6 In a furnace closing and charging means for refuse destructors and other furnaces, the combination of a furnace having an upper inlet opening and a container for holding material for charging the furnace through the said opening, shiftable closin means for the furnace having a rising and falling movement, shiftable closing means for the container operatively associated with the closing means for the furnace whereby the one closing means may be actuated by the other, and means for operating the closing means for the furnace and container whereby the closing means for the furnace is fully opened before the closing means for the container commences to open.

In testimony whereof I have hereunto set my hand in presence of witnesses.

HENRY NORMAN LEASK. Witnesses:

J OHN Wnmmm Tnormn, MALCOLM SMETHURs'r, T. OWDEN OBRIEN. 

